Carbureting apparatus.



R. P. 1101111111111; OABBUBETING APPARATUS. APPLIOAI'IOI IILED IOV. 5, 1912.

1,055,891. Patented Mar. 11, 1913.

2 SHEETS-SHEET 1.

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OABBUBBTING' APPARATUS. 21.10am! 31mm 110V. 5. 1m.

2 BKEETHHEET 2.

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Ravi/roan mus um or sA'r'rIcALoA, CEYLON.

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ot Lettersratent.

Patented Mar. 11,1913.

Application-fllediieveinb'cr-5, 1812? Serial No. 729,591.

Teal! ulwmz't may concern: Be it known that I, .RAYMOND Pater Docnx BY, a subject "of the" King of Great.

Britain, and r'esidingat Bat-ticaloa, Ceylon,

formerly' of Clarendon 'Villa','Wantage,

* to adjust a carbureting apparatus to Berkshire, England, have invented certain new and useful Improvements inand Relating to Carbureting Apparatus, of which the following is a specification.

Myinvcntion relates to improvements in carbureting apparatus such as for the production of air gas.

In a great many carburetors free floats have been proposed to follow or to control the level of the hydrocarbon li uid in the carburet-ing chamber. It is wellnown that following the temperature of the surrounding atmosphere, the temperature of the carbureter and the hydrocarbon li uid it contains is raised or lowered "and t at accord-.

ing to the tem erature the va orizing qualities of the hy rocarbon liqui are increased or decreased. Owing to the sudden chan in climate, it has hitherto been impossi le roduce the desired mixture over any ong period of time. Further a low temperature is caused in the carburetor by the vaporization of the hydrocarbon, and it is found in practice that if the production of traction and consequently t e temperature of. and in, the earbureting chamber has not ail'ectcd the position of the float with re ard to the level of the hydrocarbon liquid in the chamber.

Preferablyl em loy a free float "chamber or series of float c embers forming a float in which the contraction orexpansion of the air in the float, which is causd by the'de-f crease or-increase of the temperature ct-or in the carburetmg chamber, results in the cubic space in the float chamber, occupied tion of the upper by the air, contracting or expanding and consequently in the position of the float va ing with regard to the level of the hy d i'ocarbon liquid in the chamber according to the temperature.

t will be obvious that my invention may be applied in a variety of ways to different forms of carbureters.

My invention is illustrated by way of example in the accompanying drawings in which Figure 1 is an elevation mostly in vertical section of a carbureter of the class in which the free float follows the level of the hydrocarbon li uid and carries a vertical pipe, capable 0 being partially or wholly submerged and having air inlet openings at different hei hts, through which the air to be carburete is taken, and Figs. 2 and 3 are elevations mostly in vertical section showing alternative forms of this class of carbureter. Fig. 4 represents a vertical sccortion of the annular float chamber, omitting the air pipe and its support and showing the circulation notches or assages in the upper part thereof.

eferring now to Fig. 1 of the drawings, 1 indicates the carbureter tank, 2 indicates the'annular or otherwise shaped float chamber which follows the level of the carbureting liquid 3 and carries a vertical pipe 4 with a closed upper end to which air is supplied b the pipe 5. The lower end of the vertica pipe 4 is provided with a series of perforations 4 or other form of openings which constitute air inlets for admitting air to the carbureting chamber. These air inlets4' are arranged at different heights in the pipe and are adapted to be submerged or partially submerged in the hydrocarbon liquid 3 and through which the air passes through or over the hydrocarbon liquid.

The vertical pipe 4 is provided through a portion of its length with an exterior screwthread which engages the collar 11 carried by the float chamber 2. The perforations at the lower end of said ipc 4 can be partially or wholly submerged in the hydrocarbon liquid 3 by turning said pipe 4 in the collar 11. The cross-bar 12 arranged at the upper end of said pipe 4 is enga ed by the ro a 13 carried by the vertical l0( 14 which fproiectsthrough the top of the carbureting tan 1 and carries at its upper end the head 15.

The float chamber 2 is provided with open p pe members '6 r Projecting Y downwaidly water, mercury or any other noni-volatildor suitable li uid. As. shown =I prefer to weight the ower ends'bf--tlie ipe members (i, conveniently by means-,o -;-a. .series o washers 8, retained inj'position by the nuts 9 screwed over the lower ends of. the .mem: bers (3. By this arran ement the weight can easily be adjustedas desired. I

In practice the vessels 7 projectingfroin the bottom of'the carburetor tank 1 will be first tilled with tl1e fnon-volatile or other suitable liquid and the float chamber is then placed in the carburete'r' tank .with the downwardly rejecting i e members 6 resting in said vessels an nally the tank filled to the desired level with the hydrocarbon li uid.

It will )e reiulilyunderstood that following the expansion or contraction of the air in the float chamber the level of the nonvolatile liquid in the float will change and C(HlStt uently the position of the float 2 in regard to the level of the hydrocarbon liquid in the tank will vary so that more or fewer of the openings 4' are submerged depending on the temperature in said tank and more or less of the incoming air will pass through the carbureting liquld.

In order that there may be a free convection or circulation of the hydrocarbon liquid down the center and around the outer wall of the annular float chamber 2 I prefer to arrange two or more passages 16 preferably V-shaped, in the up er end 0 said float chamber, as shown in otted lines, throu' h which the hydrocarbon liquid can pass reely from around the outer wall of the fl'oat chamber near the top thereof down through the center of said chamber.

If the body of the float were continued of the same cross sectional area down into the heavier liquid used for sealing, it is obvious that its huo'yanc would increase as the level of hydrocar 'on fell, and cause an alteration in the level of the erforations relative to the surface of the l drocarbon, but this iscompensated forby the fact that the legs 6 haven cross-sectional area less than the main part of the float and thus the increase in tend Of heavy liquid in the, float, which head may be arranged to be above the level of the top of the le s, has the effect of loading the float s'omew lat, because a part of the increased head does not lie verticall over the lef and is consequentlyso mucl i added -weig t to the float. The cross-sectional areas of the legs may be soarranged relatively to the cross-sectional area of the body of the float asto insure that the per'f o-.

rations keep their position relatively to the hydrocarbon surface throughout the fall of the hydrocarbon between pie-arranged carburetor I may )rovide,in a convenientposition, a hydrocar on liquid reservoir tank 17, communicating with the carbureting tank 1 by means of a supply pipe 18 with an inletsuitably placed near the bottom of the tank land by a return pipe 19 by which the air pressure in the said reservoir tank 17 and said carburetor tank 1 is equalized. The top of the reservoir tank 17 is arranged just below the top of the air inlet pipe 5 of the carburetor. It will be obvious that with this arrangement the level of the float will normally follow and corrcs )ond with the level ofthe hydrocarbon liquic in -'the tank 17.

In Fig. 2 I show an alternative form of my invention. The annular float chamber 2 is open at the bottom and floats on the non-volatile liquid contained in the open annular chamber 20 which in turn floats in the hydrocarbon liquid 3 in the carburetor tank 1.

The operation of this carburetor is as follows :The annular vessel 20 being open at the top it is not affected by changes of temperature in the carbureter tank 1, but the float chamber 2 being closed at the top and liquid sealed at the bottom rises or falls as the temperature chan es in said tank, thus raising or lowering t- 1e vertical pipe 4 in re ard to the level of the hydrocarbon liqui in the tank 1 according to the temperature in said tank.

In Fig.3 I show another alternative form of my invention. In this form the float cham er 2 is closed and contains in its lower part a nonvolatile liquid 30 and a number of levers 21 are pivoted on suitable supports at its top. The air inlet pipe 4 is carried by the float chamber but is not in fixed relation thereto. This pipe is provided as in the other figures with perforations 4' and with an exterior screwthread. A threaded collar 23 engages said threaded pipe 4. This collar is rovidcd with dependent guide rods 27 w iich slide in guide. ears 28 secured to the inner wall of the tank 2". This collar 23 is provided with radial Sockets 23 or equivalent means which are engaged by the inner ends of the levers 21. Asmaller annular 0 en tank 22 also containing a non-volatile liquid 30 is sup ortcd on the outer ends of the levers 21. 1Q pipe 27 connects the tank 2 with the tank 22 above it. This ipe o ens at its lower end into thc tank 2" t rougi the liquid seal 30 therein llO ' and is rovidedyat-it-ssupper end -.with an.

ti U-shaped1- bend.. which depends into the liquidseal .30 in the tank- 22. ::.Tl16" tank 1 is providedin-:thisinstance-with.- guideways-l? :on opposite/sides which are" inverte 2 and a horizontalbar 22' A- guide ring- 2 is so ported :b said bar centrally above said oat'cham er 2 and serves asaguide in which the'tube t -plays as said chamber rises and falls. J I

It will be obvious that withtheexpansion or contraction of the air inthe float chamber 2' more or less-liquid will pass from the float chamber to the chamber 22 and vice versa and consequently the weight of said chamber 22 will var t ereby va ing throu h the levers 21 he height of tie pipe 4 wit i regard to the level of the hydrocarbon liquid in the carbureting tank.

Having fully described my invention what I c aim and desire to secure by Letters Patent is 2- 1. In a carbureter, the combination of a carbureting chamber containing a volatile hydrocarbon, afloat chamber floating in said carbureting chamber, an air inlet pipe carried by said float chamber and rovided with inlet openings at different heights adjacent to the normal level of said volatile liquid, means for supplying air to said inlet pipe, and automatic means controlled by the temperature of the float chamber for shifting the vertical position of said pipe to submerge or expose more or fewer 0 said openings and increase or decrease the inflow of air through the volatile hydrocarbon.

2. In a carburetor, a chamber which floats in hydrocarbon liquid an open ipe member projecting downwardly from t e bottom of tho float chamber the atterbein otherwise closed, a suitable sealing liquid into which said pipe member dips and upon which the hydrocarbon is adapted to float, a source of supply of air to be carbureted, and a pipe for carrying such air having its delivery opening controlled by the movements of the said float chamber.

3. In a carburetor, a float chamber, which follows the level of the hydrocarbon liquid, an open pipe member pro'ecting downward y from the bottom of t e float chambet the latter bein otherwise closed, a suit able sealing liquid into which said pipe member dips and upon which the hydrocarbon floats and the said float chamber being weighted to cause the sealing liquid to rise above the level of the top of the pipe member and by causing pre-arranged load-- ing of the float, to centre the rate at which the float falls relatively to the surfaceof the hydrocarbon liquid.

4. n a carbureter having a float chamber n this construction the float chamber, 2" has a'bracket composed: of two uprights which follows the level. of the hydrocarbon liquid in a-:containing vessel, a float chamvberlopen'only at its lower end, a suitable sealingfliquid into which said float chamber dips, and an air supply pipe passing up through the bottom of the containing vessel and communicatin and telescoping with an uppenpipe which is closed at its upper end 7 and'has an outlet or outlets at its lower end,

said upper pipe carried by the float and moving therewith relatively to the surface of-the liquid hydrocarbon in accordance with changes in temperature of the carbureter.

5. In a carburetor, the combination of a carbureting Cllflll'lbfil containing a nonvolatile liquid in its lower part. adapted to serve as a liquid seal, a volatile liquid on said sealing liquid and a gas space above said volatile liquid, a float chamber disposed within said carbureting chamber and floating in the li uid contained therein, the interior of sai float. chamber being in communication with the interior of said ourbureting chamber through said sealing liquid, the top of said liquid within said float chamber constituting a surface against which as contained therein presses, said surface eing capable of yielding under variations of the ressure due to change of temperature and thereby varying the gas containing capacity of said float chamber, and means whereby the variation of the as containing capacity of the floatchanner controls the relative proportion of hydrocarbon and air in the combustible mixture produced in said carbureting chamber.

6. In a carbureter, the combination of a carbureting chamber containing a nonvolatile liquid in its lower part adapted to serve as a liquid seal, a volatile liquid on said sealin li uid, and a gas space above said volatile liquid, a float chamber (lisgosed within said carbureting chamber and outing in the liquid contained therein, the interior of said float chamber being in communication with the interior of said carbureting chamber through said sealing liquid, the top of said liquid within said float chamber constituting a surface against which gas contained therein presses, said surface being capable of yielding under variations of the pressure due to change of temperature and thereby varying the gas containing capacity of said float chamber, an air inlet pi e carried by said flout. chamher and provi ed with openings at dill'erent. heights adjacent to the normal level of said volatile liquid and means for supplying air to said inlet pipe.

7. In a carburetor, the combination of a carbureting chamber containing a nonvolatile liquid in its lower part adapted to serve as a liquid seal, a volatile liquid on said sealing liquid and a gas space above said volatile liquid-{i a-f float chamber dis interior of said fioatchamber being injcOm munication with; thej interior moi-said ,carr' bu reting, chamber t-hrou h 'saidi sealing. .llq-

uid, the top-of-saidliqu1d;,.w'ithin said float chamber constitutingn a surface being capable of .-yielding-under-variations of the Zpressur'e;duefiitoachange of temperature an thereby'va ingthe gas containing capacity of said iiimtlchamber; an adjustable air pipe carried by saidfloat chamber and provided with 0 enings' at different heights adjacent to tie normal level of said volatile-liquid, and means for supplying air to said pipe.

8. In a carbureter, theeombination of a carbureting chamber containing a nonvolatile liquid in its lower art adapted to serve as a li uid seal, avo iatile liquid on said sealin i uid and a gas space above said volatie liquid, a float chamber disposed within said carbureting chamber and floating in the liquid contained therein, the

a a. i s ur iag ns which -gas conta ned- -ltherem-.;presses, sald interior of said float chamber being in communlcatlon with the-interior of sand carburetingchamberthrough said sealing liquidgi the top of said liquid within said float chamber constituting a surface against which as contained therein presses, said surfaceeing capable of yielding under variations of pressure due to change of temperature an thereby varying the gas containing capacity.- .of said float chamber, an

airinlet pi e carried by said float chamber and provi ed with openings at different heights adjacent to the normal level of said volatile'liquid, and 'a stationar air supply pipe extending into the movable air inlet ipe connected with said float chamber and aYin its orifice above the level of the volati e liquid in said carbureting chamber. In witness whereof I have hereunto signed my name this 7th day of October 1912, in the presence of two subscribing witnesses.

RAYMOND PELLY DOUDNEY.

Witnesses: I

SAMUEL J. C. KAms Saarau, RATNAWURA P. JOHN Svreno.

Copiel 0! this patent may be obtained or live cents each, by addressing the Commissioner or Patentl, Washington, D. C." 

